> Markdown version of [/jobs/ext/2178402-senior-cyber-engineer-ts-sci-w-ci-poly-required](https://www.wearedevelopers.com/jobs/ext/2178402-senior-cyber-engineer-ts-sci-w-ci-poly-required). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Cyber Engineer (TS/SCI w/CI Poly Required) - **Company:** Everfox LLC - **Location:** Herndon, VA, United States - **Experience:** Expert - **Salary:** $151,800.0 - $187,500.0 - **Contract:** Permanent contract - **Skills:** Complex Networks, Cyber Security, Computer Networks, Computer Engineering, Information Leak Prevention, Data Security, Linux, Linux System Administration, Software Systems, TCP/IP, Network Routers, Scripting, Enterprise Software Applications, Software Application Programming, Firewalls (Computer Science), Information Technology - **Published:** August 22, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9099373/senior-cyber-engineer-tssci-wci-poly-required ## About the Role * Active TS/SCI clearance with CI Polygraph (currently in use). * Minimum of 8 years' experience in a cyber engineer role supporting enterprise software solutions. * Strong experience in Linux and scripting. * Excellent communication skills; ability to relay technical information to customers and laypersons. * Interest or experience in cybersecurity practices, methodologies, technologies, application design and development, or operational environments. * Excellent knowledge of networking concepts (e.g., TCP/IP, firewalls, routers). * BS in Computer Science, Computer Engineering, Information Security, or equivalent. * DODI 8570.1-M Compliance at IAT Level I; SANS GSEC, CISSP preferred. Key Education Requirements: * Typically requires a minimum of 8 years of related experience. * Professional certifications preferred (SANS GSEC, CISSP). * May require compliance with DODI 8570.1-M at IAT Level I. Additional Skills and Experience (Nice to Have): * Experience with security design and architecture of Cross Domain solutions (CDS). * Working knowledge of virtualized and networked environments. * Strong verbal and technical writing skills. * Experience with security COTS product integration (e.g., firewall, web gateways, Data Loss Prevention). * Ability to prepare documentation to support Assessment and Authorization (A&A) activities. * Apply knowledge of current Information Assurance (IA) policies as a contributor to secure solution architecture and design. ## Description The Senior Cyber Engineer will play a critical role in designing, deploying, and supporting enterprise Cross Domain solutions for U.S. Government customers. This position is focused on Everfox Cross Domain technologies and requires direct customer engagement to ensure successful implementation and ongoing support. Specialized training will be provided, and the candidate is expected to become proficient in all aspects of complex software solution deployment., * Utilize Linux and scripting expertise to support and field critical customer-driven requirements, enabling secure data transfer. * Engage directly with customers to provide advanced design, analysis, and implementation of Everfox software solutions. * Review, analyze, and define requirements; design integrated solutions; implement Everfox and non-Everfox technologies; integrate multiple tools across disciplines; perform formal security and functional testing. * Troubleshoot technical issues onsite in Linux-based environments, configure Everfox solutions, and deliver customer requirements. * Work on complex network environments, troubleshoot issues, design and implement failover capabilities, and validate interoperability with enterprise components. * Provide technical briefings to customers and Everfox corporate leadership as required. * Deliver training, troubleshooting, and on-site/remote support to customers as mission needs require. ## Related Videos - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [JavaScript? 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